Adakite and Kenyte

Adakite

Kenyte

Definition

Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs

Kenyte is a variety of porphyritic phonolite or trachyte rock with rhomb shaped phenocrysts of anorthoclase with variable olivine and augite in a glassy matrix

History

Origin

Adak, Aleutian Islands

Mount Kenya

Discoverer

Defant and Drummond

J. W. Gregory

Etymology

From Adak, Aleutian Islands

From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Not Applicable

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Porphyritic

Glassy, Granular

Color

Black, Brown, Light to Dark Grey

Brown, Buff, Cream, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Dull and Soft

Banded and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

Decorative Aggregates, Entryways, Homes, Interior Decoration, Kitchens

Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

As Building Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Whetstones

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics

Medical Industry

Not Yet Used

Antiquity Uses

Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Commemorative Tablets, Pottery, Used in aquariums

Cemetery Markers, Creating Artwork

Types

Not Available

Features

Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock

Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Used

Fossils

Absent

Formation

Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.

Kenyte is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content

Olivine, Plagioclase, Pyroxene

Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite

Compound Content

Aluminium Oxide, MgO, Silicon Dioxide

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism

Weathering

Yes

Types of Weathering

Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

Yes

Types of Erosion

Coastal Erosion, Sea Erosion, Water Erosion

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

3-4

5.5-6

Grain Size

Fine to Medium Grained

Fine Grained

Fracture

Conchoidal

Conchoidal to Uneven

Streak

Bluish Black

White, Greenish White or Grey

Porosity

Less Porous

Highly Porous

Luster

Grainy, Pearly and Vitreous

Greasy to Dull

Compressive Strength

Not Available

150.00 N/mm²

Cleavage

Not Available

Poor

Toughness

Not Available

Specific Gravity

Not Available

2.6

Transparency

Opaque

Translucent to Opaque

Density

Not Available

2.6 g/cm³

Thermal Properties

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam

Africa

Ethiopia, Somalia, South Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Europe

Iceland

Andorra, Finland, France, Germany, Great Britain, Italy, Norway, Portugal, Spain, Sweden

Others

Not Yet Found

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Brazil, Chile, Colombia, Uruguay, Venezuela

Deposits in Oceania Continent

Australia

Not Yet Found

New Zealand, Queensland, South Australia, Tasmania, Western Australia

Summary >>

<< Reserves

All about Adakite and Kenyte Properties

Know all about Adakite and Kenyte properties here. All properties of rocks are important as they define the type of rock and its application. Adakite and Kenyte belong to Igneous Rocks.Texture of Adakite is Porphyritic whereas that of Kenyte is Glassy, Granular. Adakite appears Dull and Soft and Kenyte appears Banded and Foilated. The luster of Adakite is grainy, pearly and vitreous while that of Kenyte is greasy to dull. Adakite is available in black, brown, light to dark grey colors whereas Kenyte is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Adakite are commemorative tablets, pottery, used in aquariums and that of Kenyte are cemetery markers, creating artwork.